WO2015156167A1 - Batterie rechargeable plane - Google Patents

Batterie rechargeable plane Download PDF

Info

Publication number
WO2015156167A1
WO2015156167A1 PCT/JP2015/060125 JP2015060125W WO2015156167A1 WO 2015156167 A1 WO2015156167 A1 WO 2015156167A1 JP 2015060125 W JP2015060125 W JP 2015060125W WO 2015156167 A1 WO2015156167 A1 WO 2015156167A1
Authority
WO
WIPO (PCT)
Prior art keywords
length
secondary battery
power generation
generation element
exterior member
Prior art date
Application number
PCT/JP2015/060125
Other languages
English (en)
Japanese (ja)
Inventor
壮宏 前田
齋藤　崇実
梓 松尾
亜美 青梅
新田　芳明
Original Assignee
日産自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日産自動車株式会社 filed Critical 日産自動車株式会社
Priority to EP15776103.2A priority Critical patent/EP3131135B1/fr
Priority to KR1020167027691A priority patent/KR101917488B1/ko
Priority to CN201580019224.XA priority patent/CN106165144B/zh
Priority to US15/302,435 priority patent/US10431852B2/en
Priority to JP2016512677A priority patent/JP6281635B2/ja
Publication of WO2015156167A1 publication Critical patent/WO2015156167A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0569—Liquid materials characterised by the solvents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H01M4/622—Binders being polymers
    • H01M4/623—Binders being polymers fluorinated polymers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • H01M50/136—Flexibility or foldability
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/028—Positive electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present invention relates to a flat secondary battery.
  • a flat battery element in which a sheet-like or film-like positive electrode plate, a separator for holding an electrolyte, and a negative electrode plate are stacked is housed in a bag-like outer case formed of a laminate sheet mainly made of a resin film, and the positive electrode plate and A non-aqueous electrolyte secondary battery is disclosed in which a positive electrode lead and a negative electrode lead each having one end connected to a negative electrode plate are drawn out from a seal portion of an exterior case (Patent Document 1).
  • the secondary battery When the thickness of the electrode expands due to repeated charge and discharge, the secondary battery has anisotropy with different shrinkage rates in the direction along the long side and the direction along the short side on the electrode stack surface. Yes. Further, in the above secondary battery, an excess space formed on the long side of the electrode laminate surface formed between the electrode laminate and the laminate outer case, and a short side of the electrode laminate surface are formed. When the thickness of the electrode expands in the surplus space, the volume of the surplus space formed on the short side of the laminated surface of the electrodes becomes too large, and an electrolyte or generated gas is generated in the surplus space. Concentrates and the battery reaction becomes non-uniform so that the durability of the battery is reduced.
  • the problem to be solved by the present invention is a flat secondary that suppresses nonuniform battery reaction and improves cell durability even when the thickness of the electrode expands by repeated charge and discharge. It is to provide a battery.
  • the present invention includes a laminated power generation element, and a pair of exterior members formed in a rectangular shape when viewed from the stacking direction of a plurality of electrodes while sealing the multilayer power generation element and an electrolyte solution.
  • a contact portion including a contact surface that contacts the uppermost layer electrode, a sealing portion that overlaps the exterior members at the outer peripheral position of the exterior member, and an extending portion that extends from the contact portion to the seal portion. and, the average length of the extending portion (L a, L B) is, to solve the above problem by satisfying 1 ⁇ L a / L B ⁇ 2.
  • the surplus space between the power generation element and the exterior member is defined in consideration of the anisotropy of the contraction of the electrode that accompanies repeated charge and discharge. Even if it is reduced in the direction, it is possible to suppress the excessive space formed on the short side of the laminated surface of the electrodes from becoming too large. As a result, it is possible to suppress the battery reaction from becoming uneven and improve the durability of the cell.
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG. It is the top view (A) of the secondary battery of FIG. 1, and a part (B) of sectional drawing, and is the figure which expanded surplus space, (a) shows the surplus space of a long side direction, (b) Indicates the surplus space in the short side direction.
  • It is the top view and sectional drawing of the secondary battery which concern on this embodiment. It is the top view and sectional drawing of the secondary battery which concern on the modification of this embodiment. It is the top view and sectional drawing of the secondary battery which concern on the modification of this embodiment.
  • 4 is a graph showing capacity retention ratios with respect to parameters (L A / L B ) in secondary batteries according to Examples 1 to 9 and Comparative Examples 1 to 4.
  • 6 is a graph showing capacity retention ratios with respect to parameters (L A / L B ) in secondary batteries according to Examples 10 to 11 and Comparative Examples 5 and 6.
  • 4 is a graph showing the relationship between parameter (b) and parameter (L / d) in the secondary batteries according to Examples 1 to 11 and Comparative Examples 3, 4, and 6.
  • 5 is a graph showing the relationship between parameter (b) and parameter (a / d) in the secondary batteries according to Examples 1 to 11 and Comparative Examples 4 and 6.
  • the secondary battery 1 is a lithium-based, flat plate, and laminated type flat (thin) battery. As shown in FIGS. 1 and 2, the five positive plates 11 and the ten sheets The separator 12, six negative plates 13, a positive terminal 14, a negative terminal 15, an upper exterior member 16, a lower exterior member 17, and an electrolyte (not shown) are included. In addition, the number of the positive electrode plate 11, the separator 12, and the negative electrode plate 13 is only an example, and may be another number.
  • the positive electrode plate 11, the separator 12, and the negative electrode plate 13 constitute a power generation element 18, the positive electrode plate 11 and the negative electrode plate 13 constitute an electrode plate, and the upper exterior member 16 and the lower exterior member 17 constitute a pair of exterior members. Constitute.
  • the positive electrode plate 11 constituting the power generating element 18 includes a positive electrode side current collector 11a extending to the positive electrode terminal 14, and positive electrode layers 11b and 11c formed on both main surfaces of a part of the positive electrode side current collector 11a, respectively.
  • the positive electrode layers 11b and 11c are formed only on the portion of the positive electrode plate 11 that overlaps with the separator 12 substantially when the positive electrode plate 11, the separator 12 and the negative electrode plate 13 are stacked to form the power generation element 18.
  • 11b and 11c may be formed.
  • the positive electrode plate 11 and the positive electrode side current collector 11a are formed of a single conductor. However, the positive electrode plate 11 and the positive electrode side current collector 11a are formed separately and joined together. May be.
  • the positive electrode side current collector 11a of the positive electrode plate 11 is made of an aluminum foil.
  • the positive electrode side current collector 11a may be composed of an electrochemically stable metal foil such as an aluminum alloy foil, a copper foil, or a nickel foil.
  • the positive electrode layers 11b and 11c of the positive electrode plate 11 contain lithium-nickel-manganese-cobalt composite oxide (hereinafter also referred to as “NMC composite oxide”) as a positive electrode active material.
  • the NMC composite oxide has a layered crystal structure in which a lithium atomic layer and a transition metal (Mn, Ni, and Co are arranged in order) are stacked alternately via an oxygen atomic layer.
  • the positive electrode active material may be a lithium composite oxide such as lithium nickelate (LiNiO2), lithium manganate (LiMnO2), or lithium cobaltate (LiCoO2), and a mixture of these.
  • the positive electrode layers 11b and 11c are formed of a positive electrode active material containing an NMC composite oxide, a carbon black conductive agent such as ketjen black and acetylene black, an aqueous solution of polyvinylidene fluoride (PVdF) and polytetrafluoroethylene (PTFE).
  • PVdF polyvinylidene fluoride
  • PTFE polytetrafluoroethylene
  • a mixture of a binder (adhesive) such as a dispersion and a slurry viscosity adjusting solvent such as N-methyl-2-pyrrolidone (NMP) is applied to both main surfaces of the positive electrode side current collector 11a, dried and It is formed by rolling.
  • the negative electrode plate 13 constituting the power generation element 18 includes a negative electrode side current collector 13a extending to the negative electrode terminal 15 and negative electrode layers 13b and 13c formed on both main surfaces of a part of the negative electrode side current collector 13a, respectively. And have. Note that the negative electrode layers 13b and 13c of the negative electrode plate 13 may also be formed only on the portion of the negative electrode plate 13 that substantially overlaps with the separator 12 in the same manner as the positive electrode side. Further, in this example, the negative electrode plate 13 and the negative electrode side current collector 13a are formed of a single conductor. However, the negative electrode plate 13 and the negative electrode side current collector 13a are formed as separate bodies and are joined together. May be.
  • the negative electrode side current collector 13a of the negative electrode plate 13 is made of copper foil.
  • the negative electrode side current collector 13a may be made of an electrochemically stable metal foil such as a nickel foil, a stainless steel foil, or an iron foil in addition to the copper foil.
  • the negative electrode layers 13b and 13c of the negative electrode plate 13 contain artificial graphite as a negative active material.
  • the negative active material is, for example, Si alloy, Gr mixed with SIi, or occlusion and release of lithium ions such as amorphous carbon, non-graphitizable carbon, graphitizable carbon, graphite, etc. Anything to do.
  • the negative electrode layers 13b and 13c are made of a negative electrode active material containing artificial graphite, an ammonium salt of carboxymethyl cellulose and a styrene-butadiene copolymer latex as a binder, and dispersed in purified water to form a negative electrode active material slurry. Is applied to both main surfaces of the negative electrode side current collector 13a, and dried and rolled.
  • the negative electrode active material slurry may use PVdF dispersed as a binder in NMP.
  • the separator 12 of the power generation element 18 prevents a short circuit between the positive electrode plate 11 and the negative electrode plate 13 described above, and may have a function of holding an electrolyte.
  • the separator 12 is a microporous film made of polyolefin such as polyethylene (PE) or polypropylene (PP), for example. When an overcurrent flows, the pores of the layer are blocked by the heat generation and the current is cut off. It also has a function.
  • the separator 12 is not limited to a single-layer film such as polyolefin, but a three-layer structure in which a polypropylene film is sandwiched with a polyethylene film, a laminate of a polyolefin microporous film and an organic nonwoven fabric, or the like, a heat-resistant insulating layer A separator having a (ceramic layer) on the surface (so-called ceramic separator) can also be used.
  • various functions such as an overcurrent prevention function, an electrolyte holding function, and a separator shape maintenance (stiffness improvement) function can be provided.
  • the power generation element 18 described above is configured as a stack-side power generation element in which the positive electrode plates 11 and the negative electrode plates 13 are alternately stacked via the separator 12.
  • the five positive plates 11 are respectively connected to the positive terminal 14 made of metal foil via the positive current collector 11a, while the six negative plates 13 are connected to the negative current collector 13a.
  • each is connected to a negative electrode terminal 15 made of metal foil.
  • the positive electrode terminal 14 and the negative electrode terminal 15 are not particularly limited as long as they are electrochemically stable metal materials.
  • the positive electrode terminal 14 for example, a thickness of about 0.2 mm is used, as in the positive electrode side current collector 11 a described above.
  • An aluminum foil, an aluminum alloy foil, a copper foil, a nickel foil, or the like can be given.
  • the negative electrode terminal 15, like the above-mentioned negative electrode side collector 13a nickel foil, copper foil, stainless steel foil, iron foil, etc. of thickness about 0.2 mm can be mentioned, for example.
  • the metal foil itself constituting the current collectors 11a and 13a of the electrode plates 11 and 13 is extended to the electrode terminals 14 and 15, in other words, one current collector foil 11a. , 13a is formed with a part of the electrode layer (positive electrode layer 11b, 11c or negative electrode layer 13b, 13c), the remaining end is used as a connecting member to the electrode terminal, and the electrode plates 11, 13 are used as the electrode terminals 14, 15
  • the metal foil constituting the current collectors 11a and 13a located between the positive electrode layer and the negative electrode layer and the metal foil constituting the connecting member may be connected by different materials or components. .
  • the power generation element 18 is housed and sealed in the upper exterior member 16 and the lower exterior member 17 together with the electrolyte. In addition, it is good also considering the part in which the positive electrode and the negative electrode substantially overlap through the separator among the electrode plates laminated
  • the upper exterior member 16 and the lower exterior member 17 are a pair of members, and are a case for sealing the power generation element 18 and the electrolytic solution, and are configured as follows.
  • the upper exterior member 16 and the lower exterior member 17 are each formed in a cup shape, and the upper exterior member 16 includes an abutting portion 161, extending portions 162 and 164, and a sealing portion 163. 165.
  • the lower exterior member 17 includes a contact portion 171, extending portions 172 and 174, and sealing portions 173 and 175. Further, the upper exterior member 16 and the lower exterior member 17 are formed in a rectangular shape having a long side and a short side when viewed from the stacking direction of the electrode plates stacked on the power generation element 18 (z direction in FIG. 1). ing.
  • the abutting portion 161 has an abutting surface that abuts the main surface of the positive electrode plate 11 (a surface parallel to the laminated surface of the electrode plates laminated on the power generation element 18: the xy plane in FIG. 1).
  • the contact surface is parallel to the main surface of the negative electrode plate 13 located in the uppermost layer and has the same shape as the main surface.
  • the contact surface of the contact portion 161 corresponds to the lower surface of the lower layer member of the multilayer contact portion 161.
  • the contact portion 161 receives pressure directly from the negative electrode plate 13.
  • the contact surface of the contact portion 101 is a portion that receives pressure from the power generation element 18 in the main surface of the exterior member 16 corresponding to the main surface of the positive electrode plate 11.
  • the contact surface receives pressure as a reaction force from the power generation element 18 in a state where the power generation element 18 is sealed by the exterior members 16 and 17.
  • the contact surface receives pressure from the power generation element 18 when the power generation element 18 expands due to the use of a battery.
  • the sealing portions 163 and 165 are in close contact with the sealing portions 173 and 175 of the exterior member 17 while overlapping.
  • the sealing portions 163 and 165 are configured to surround the power generation element 18 while being positioned on the outer periphery of the exterior member 16 in a plan view of the exterior member 16 as viewed from the z direction.
  • the sealing parts 163 and 165 are located outside the contact part 161 via the extension parts 162 and 164 in a plan view of the exterior member 16 as viewed from the z direction.
  • the sealing parts 163 and 165 are positioned between the contact part 161 and the contact part 171 at a height in the stacking direction (z direction) of the electrode plates of the power generation element 18.
  • the sealing portions 163 and 165 are positioned at a height lower than the contact portion 161 in the stacking direction (z direction). In the example of FIG. 2, the sealing portions 163 and 165 are positioned at an intermediate portion between the contact portion 161 and the contact portion 171 at a height in the stacking direction (z direction).
  • sealing parts 163 and 165 shown in FIG. 2 are located at both ends in the direction along the long side of the exterior member 16 formed in a rectangular shape.
  • a pair of sealing portions similar to the sealing portions 163 and 165 are formed at both ends in the direction along the short side of the exterior member 16.
  • the extending portion 162 is a portion where the exterior member 16 is extended from the contact portion 161 to the sealing portion 163, and includes the stacked power generation element 18 and the sealing portions 163 and 173 (of the exterior members 16 and 17. And a side surface).
  • the extending part 162 has a flat part 162a and an inclined part 162b.
  • the flat portion 162a is formed by a surface parallel to the contact surface of the contact portion 161.
  • the inclined portion 162b is formed by a surface that is inclined with respect to the parallel surface of the flat portion 162a.
  • the exterior member 16 is formed by extending along the contact surface of the contact portion 161 to form the flat portion 162a, and bends at the outer edge of the flat portion 162a and extends toward the sealing portion 163.
  • a portion 162b is formed.
  • the flat portion 162a functions as a margin for forming a space between the stacked power generation element and the sealing portions 163 and 173 (side surfaces of the exterior members 16 and 17), and the flat portion 162a is provided. Thereby, the said space has expanded toward the direction (x direction or y direction) along the lamination surface of an electrode.
  • the extended portion 164 is a portion where the exterior member 16 extends from the contact portion 161 to the sealing portion 165, and includes a flat portion 164a and an inclined portion 164b.
  • the configurations of the extending portion 164, the plane portion 164a, and the inclined portion 164b are the same as the configurations of the extending portion 162, the plane portion 162a, and the inclined portion 162b described above, and thus the description thereof is omitted.
  • the extending portion and the sealing portion are not limited to positions at both ends in the direction along the long side of the exterior member 16, but are also formed at positions at both ends in the direction along the short side of the exterior member 16.
  • the exterior member 17 is a member that seals the power generation element 18 and the electrolyte from the opposite side of the exterior member 16. Since the configuration of the exterior member 17 is the same as the configuration of the exterior member 16, the description thereof is omitted.
  • the configuration of the contact portion 171 is the same as the configuration of the contact portion 161
  • the configuration of the extending portions 172 and 174 is the same as the configuration of the extending portions 162 and 164
  • the configuration of the sealing portions 173 and 175. Is the same as the configuration of the sealing portions 163 and 165.
  • the upper exterior member 16 and the lower exterior member 17 of this example are both made of polyethylene, modified polyethylene, polypropylene, modified polypropylene, or ionomer from the inside to the outside of the secondary battery 1.
  • An inner layer composed of a resin film excellent in electrolytic solution resistance and heat-fusibility, an intermediate layer composed of a metal foil such as aluminum, and an electrical insulation such as a polyamide resin or a polyester resin
  • a three-layer structure composed of an outer layer made of a resin film having excellent properties.
  • both the upper exterior member 16 and the lower exterior member 17 are made of resin such as polyethylene, modified polyethylene, polypropylene, modified polypropylene, or ionomer on one surface (inner surface of the secondary battery 1) of a metal foil such as aluminum foil. And the other surface (the outer surface of the secondary battery 1) is laminated with a polyamide resin or a polyester resin, and is formed of a flexible material such as a resin-metal thin film laminate material.
  • the inner layers of the exterior members 16 and 17 are made of, for example, a resin such as polyethylene, modified polyethylene, polypropylene, modified polypropylene, or ionomer, so that good fusion properties with the metal electrode terminals 14 and 15 can be obtained. It can be secured.
  • the positive terminal 14 is led out from one end of the sealed exterior members 16 and 17, and the negative terminal 15 is led out from the other end. Since there is a gap in the fused portion between the upper exterior member 16 and the lower exterior member 17 by the thickness of the electrode terminals 14 and 15, the electrode terminals 14 and 15 are maintained in order to maintain the sealing performance inside the secondary battery 1.
  • a seal film made of polyethylene, polypropylene, or the like may be interposed in a portion where the exterior members 16 and 17 are in contact with each other. It is preferable from the viewpoint of heat-fusibility that the seal film is made of a resin of the same system as the resin constituting the exterior members 16 and 17 in both the positive electrode terminal 14 and the negative electrode terminal 15.
  • These exterior members 16, 17 enclose the power generation element 18, part of the positive electrode terminal 14 and part of the negative electrode terminal 15, so that the internal liquid space formed by the exterior members 16, 17 contains an organic liquid solvent. While injecting a liquid electrolyte having a lithium salt such as lithium chlorate, lithium borofluoride or lithium hexafluorophosphate as a solute, the space formed by the exterior members 16 and 17 is sucked into a vacuum state, The outer peripheral edges of the members 16 and 17 are heat-sealed by hot pressing and sealed.
  • a liquid electrolyte having a lithium salt such as lithium chlorate, lithium borofluoride or lithium hexafluorophosphate
  • organic liquid solvents examples include propylene carbonate (PC), ethylene carbonate (EC), dimethyl carbonate (DMC), ester solvents such as diethyl carbonate (DEC) and ethyl methyl carbonate (EMC), and vinylene carbonate (VC ), Fluoroethylene carbonate (FEC), propane sultone (PS) and the like added as additives, but the organic liquid solvent of this example is not limited to this, An organic liquid solvent prepared by mixing and preparing an ether solvent such as butylactone ( ⁇ -BL) and dietochiethane (DEE) can also be used. It is desirable to add various additives such as vinylene carbonate (VC), fluoroethylene carbonate (FEC), 1,3-propane sultone (PS) to the organic liquid solvent.
  • PC propylene carbonate
  • EC ethylene carbonate
  • DMC dimethyl carbonate
  • EMC diethyl carbonate
  • EMC ethyl methyl carbonate
  • VC vinylene carbonate
  • the volume energy density and the rated discharge capacity of the secondary battery 1 will be described.
  • a running distance (cruising range) by one charge is several hundred km.
  • the secondary battery 1 preferably has a volume energy density of 157 Wh / L or more and a rated capacity of 20 Wh or more.
  • the secondary battery 1 is a flat laminated battery, and the ratio of the battery area to the rated capacity (projected area of the battery including the battery outer casing) is 5 cm 2 / Ah or more, and The rated capacity is 3 Ah or more.
  • the aspect ratio of the laminated surface of the rectangular electrodes is preferably 1 to 3, more preferably 1 to 2.
  • the electrode aspect ratio is defined as the aspect ratio of the rectangular positive electrode active material layer.
  • FIG. 3 is a plan view (A) of the secondary battery and an enlarged cross-sectional view (B) of the ⁇ and ⁇ portions of the secondary battery.
  • 3A shows the state of both end portions in the direction along the long side
  • FIG. 3B shows the state of both end portions in the direction along the short side.
  • the surplus space is a space formed between the stacked power generation element 18 and the side surfaces (corresponding to the extending portions) of the exterior members 16 and 17.
  • the long side and the short side represent rectangular sides as the shape of the exterior members 16 and 17 when viewed from the electrode stacking direction (z direction).
  • the t 1 indicates the time (t) until the expansion from the initial state.
  • the thickness of the power generation element 18 is d 0
  • the length of the flat portion 162 a located at the end in the direction along the long side is a 0A .
  • the length of the plane part 162a located in the edge part of the direction along a short side is a0B .
  • the thickness of the power generation element 18 corresponds to the thickness from the electrode plate positioned at the same height as the sealing portions 163 and 173 to the electrode positioned in the uppermost layer in the electrode stacking direction (z direction), It is half the total thickness of the power generation element 18.
  • the length of the plane portion 162a is the length of the plane portion 162a in the direction along the parallel plane (x direction).
  • the power generation element 18 expands in the z direction, so that the thickness of the power generation element 18 changes from d 0 to d 1 (> d 0 ).
  • the width of the power generation element 18 in the x direction decreases with expansion in the z direction. That is, the power generating element 18 expands in the z direction and contracts in the x direction.
  • the width of the power generation element 18 in the y direction decreases with expansion in the z direction. That is, the power generating element 18 expands in the z direction and contracts in the y direction.
  • the laminated surface of the electrode plates constituting the power generation element 18 is long in the long side direction and short in the short side direction. Therefore, the collection speed of the electrode plate in the direction along the xy plane is faster in the direction along the long side than in the direction along the short side.
  • the contraction speed in the long side direction is p and the contraction speed in the short side direction is q, p> q.
  • the length (a A ) of the flat portion 162a in the long side direction after shrinkage and the length (a B ) of the flat portion 162a in the short side direction are expressed by the expressions shown in FIG.
  • the length (a A ) of 162a is shorter than the length (a B ) of the plane portion 162a.
  • the power generation element configured in a rectangular shape as viewed from the stacking direction of the electrode plates has anisotropy (a property that the contraction speed is different between the long side direction and the short side direction). Therefore, unlike the secondary battery 1 according to this embodiment, for example, the volume of the first surplus space located at both ends in the long side direction is compared with the volume of the second surplus space located at both ends in the short side direction. If it is small, the volume of the first surplus space becomes smaller as the battery is used, and the volume of the surplus space is impaired. And since the electrolyte solution and the gas generated inside the battery are biased to one surplus volume, the battery reaction is not uniform and the durability is lowered.
  • the secondary battery 1 takes into account the above-described anisotropy, and the volume balance of the surplus space after the expansion of the power generation element (for example, the surplus space becomes longer than the length of the exterior member due to expansion of the power generation element).
  • a pair of extensions located at both ends in the long side direction so that the volume of the surplus space formed on the short side of the laminated surface of the electrode does not become too large even if it is reduced in the side direction)
  • the relationship between the average length (L A ) of the portions and the average length (L B ) of the pair of extending portions located at both ends in the short side direction is defined so as to satisfy the following formula (1).
  • the durability of the cell is improved.
  • FIG. 4 is a plan view of the secondary battery 1, a cross-sectional view taken along the xz plane along the long side, and a cross-sectional view taken along the xz plane along the short side. parameters included in 4) (L a, L B , d, a a, which is a diagram for explaining a a B).
  • L A1 is the length of the extending portion 162, the long side direction of the flat portion 162a And the length of the inclined portion 162b in the long side direction.
  • the plane part 162a and the inclined part 162b in the long side direction are a flat part and an inclined part located at one end of both ends in the direction along the long side in the first cross section.
  • L A2 is the length of the extending portion 164, and is the length obtained by combining the length of the flat portion 164a in the long side direction and the length of the inclined portion 164b in the long side direction.
  • L B1 is the length of the extending portion 162, the length of the flat portion 162 a in the short side direction, and the short side direction It is the length which combined the length of the inclination part 162b.
  • the plane part 162a and the inclined part 162b in the short side direction are a plane part and an inclined part that are located at one end of both ends in the direction along the short side in the second cross section.
  • L B2 is the length of the extending portion 164, and the length of the short side direction of the flat portion 164a, a combined length of an inclined portion length of 164b in the short side direction.
  • the relationship between L A , L B , and d is preferably defined so as to satisfy the following condition 1.
  • d is the thickness of the power generation element 18, and in the electrode stacking direction (z direction), from the electrode plate located at the same height as the sealing portions 163 and 173 to the electrode plate located in the uppermost layer. It is the thickness or the thickness from the electrode plate located at the same height as the sealing portions 163 and 173 to the electrode plate located at the lowermost layer (see FIG. 4).
  • b is the length from the electrode located between the plurality of sealing portions 163, 173, 165, 175 to the sealing portions 163, 173, or between the sealing portions 163, 173, 165, 175. It is the length from the electrode to seal part 165,175.
  • the first and second straight lines indicate the characteristic of the maximum value of L A / d with respect to b or the characteristic of the maximum value of L B / d with respect to b. The first and second straight lines will be described in examples.
  • the surplus space is expanded while maintaining the volume balance with respect to the thickness of the power generation element 18, so when the power generation element 18 expands, the portion that contacts the power generation element 18 or the sealing portion 163 or the like Such stress can be relieved. For this reason, even when the exterior member 16 is deformed, the pressure applied to the power generation element 18 is suppressed from becoming non-uniform, the battery reaction can be made uniform, and the durability of the cell is improved.
  • the relationship between a A and a B is preferably defined so as to satisfy the following formula (2). 1 ⁇ a A / a B ⁇ 7 (2)
  • a A1 is the length of the long side of the flat portion 162a
  • a A2 is the length of the long side of the flat portion 164a.
  • a B1 is the length of the plane part 162a in the short side direction
  • a B2 is the length of the plane part 164a in the short side direction.
  • the relationships a A , a B, and d are preferably defined so as to satisfy the following condition 2.
  • the third straight line indicates the characteristic of the minimum value of a A / d with respect to b or the characteristic of the minimum value of a B / d with respect to b.
  • the fourth straight line shows the characteristic of the maximum value of a A / d with respect to b or the characteristic of the maximum value of a B / d with respect to b.
  • the third and fourth straight lines will be described in examples.
  • the definition of the shape of the secondary battery 1 represented by the formulas (1) and (2) and the definition of the shape of the secondary battery 1 satisfying the conditions 1 and 2 are limited to the secondary battery 1 shown in FIGS.
  • the present invention can also be applied to the secondary battery 1 according to Modification Example 1 below.
  • the definition of the shape of the secondary battery 1 represented by the expression (1) and the condition 1 is not limited to the secondary battery 1 illustrated in FIGS. 1 and 2, but is applied to the secondary battery 1 according to Modification 2 below. Is also applicable.
  • FIG. 5 is a plan view of the secondary battery 1 according to Modification 1, a cross-sectional view taken along the xz plane along the long side, and a cross-sectional view taken along the xz plane along the short side.
  • (1) parameters included to (4) are diagrams for (L a, L B, d , a a, a B) will be described.
  • the exterior member 17 is formed in a single plate shape, and the main surface of the exterior member 17 is parallel to the laminated surface of the electrode plates of the power generation element 18.
  • the inside of the main surface is in contact with the lowermost electrode plate of the electrode plates constituting the power generation element 18.
  • sealing portions 173 and 175 that overlap with the sealing portions 163 and 165 of the exterior member 16 are formed on the outer periphery of the main surface. The sealing portions 173 and 175 are in close contact with the sealing portions 163 and 165.
  • the upper exterior member 16 is the same as the upper exterior member 16 shown in FIG. 4, and the same applies to each parameter (L A , L B , d, a A , a B ).
  • FIG. 6 is a plan view of the secondary battery 1 according to the modified example 2, a cross-sectional view taken along the xz plane along the long side, and a cross-sectional view taken along the xz plane along the short side.
  • FIG. 5 is a diagram for explaining parameters (L A , L B , d) included in (1) to (4).
  • the upper exterior member 16 has a contact portion 161, curved portions 166 and 167, and sealing portions 163 and 165.
  • the lower exterior member 17 includes a contact portion 171, a curved portion 176, and sealing portions 173 and 175.
  • the contact portions 161 and 171 are the same as the contact portions 161 and 171 according to this embodiment, and the sealing portions 163, 165, 173, and 175 are the sealing portions 163, 165, 173, and Since this is the same as 175, description of the configuration is omitted.
  • the curved portion 166 extends from the outer edge of the contact portion 161 to the sealing portion 163 while being curved. Further, in the cross section obtained by cutting the secondary battery 1 along the xz plane, the curved portion 166 is formed to have a curve that swells outward from the inside of the secondary battery 1 as shown in FIG. . Since the configuration of the bending portion 167 is the same as that of the bending portion 166, the description thereof is omitted.
  • the exterior member 17 has curved portions 176 and 177 as well as the exterior member 16, and seals the power generation element 18 from the opposite side of the exterior member 16.
  • the abutting portion 171, the bending portions 176 and 177, and the sealing portions 173 and 175 constituting the exterior member 17 are the abutting portion 161, the bending portions 166 and 167, and the sealing portions 163 and 165 that constitute the exterior member 16. Since it is the same as that of FIG.
  • L A1 is the length of the bending portion 166 and L A2 is the length of the bending portion 167 in the cross section when cut along the xz plane along the long side.
  • L A1 is the length of the bending portion 166
  • L A2 is the length of the bending portion 167.
  • NMC complex oxide LiNi 0.5 Mn 0.3 Co 0.2 O 2 (average particle size: 10 ⁇ m)
  • PVdF polyvinylidene fluoride
  • a positive electrode active material layer was formed on the back surface, and a positive electrode plate 11 having a positive electrode active material layer formed on both surfaces of the positive electrode current collector was produced.
  • the size of the main surface of the positive electrode plate 11 was 215 mm in length and 190 mm in width.
  • the negative electrode active material slurry was prepared by dispersing 96.5% by weight of artificial graphite as the negative electrode active material, 1.5% by weight of ammonium salt of carboxymethyl cellulose and 2.0% by weight of styrene butadiene copolymer latex as the binder in purified water. did.
  • This negative electrode active material slurry was applied to a copper foil (thickness 10 ⁇ m) serving as a negative electrode current collector, dried at 120 ° C., and then compression molded with a roll press to produce a negative electrode plate 13 having a negative electrode active material layer of 10 mg / cm 2. did.
  • a negative electrode active material layer was formed on the back surface, and a negative electrode plate 13 having a negative electrode active material layer formed on both sides of the negative electrode current collector was produced.
  • the size of the main surface of the negative electrode plate 13 was 219 mm in length and 194 mm in width.
  • the power generation element 18 was produced by alternately laminating the positive electrode produced above and the negative electrode produced above via a separator (20 positive electrode layers and 21 negative electrode layers).
  • the separator was 223 mm long and 198 mm wide.
  • the obtained power generation element 18 (4) was placed in an aluminum laminate sheet bag, and an electrolytic solution was injected.
  • an electrolytic solution a solution obtained by dissolving 1.0M LiPF6 in a mixed solvent (volume ratio 1: 1: 1) of ethylene carbonate (EC): diethyl carbonate (DEC): ethyl methyl carbonate (EMC) was used.
  • the laminated lithium ion secondary battery was completed by sealing the opening of the aluminum laminate back so that the current extraction tabs connected to both electrodes were led out under vacuum conditions.
  • the size of the exterior member 16 is such that the length of the outer dimension in the x direction (x 4 in FIG. 4) is 256 mm, the length of the outer dimension in the y direction (y 4 in FIG. 4 ) is 210 mm, and the height in the z direction is high.
  • the thickness was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 except for the sealing portion of the exterior member 16 is 231 mm in the x-direction length (x 3 in FIG. 4).
  • the length in the y direction (y 3 in FIG. 4) was 200 mm.
  • the size of the portion formed by the contact portion 161 and the flat portions 162a and 164a of the exterior member 16 is the length in the x direction (x 2 in FIG. 4).
  • the length in the y direction (y 2 in FIG. 4) was 194 mm.
  • the size of the exterior member 17 was the same as that of the exterior member 16.
  • the size of the stacked power generation element 18 is such that the length in the x direction (x 1 in FIG. 4) is 215 mm, the length in the y direction (y 1 in FIG. 4) is 190 mm, and the length in the z direction (FIG. 4).
  • the length obtained by doubling d) was 8 mm.
  • the length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 280 mm
  • the length (width) in the y direction was 210 mm
  • the length (thickness) in the z direction was 8 mm.
  • capacitance of the secondary battery 1 is confirmed, and the capacity
  • the secondary battery 1 was evaluated by calculating (discharge capacity) ⁇ 100%).
  • Example 1 The secondary battery 1 manufactured as described above is referred to as Example 1.
  • Example 2 In the secondary battery 1 according to Example 2, the size of the upper surface portion of the exterior member 16 is such that the length in the x direction (x 2 in FIG. 4) is 223 mm and the length in the y direction (y 2 in FIG. 4). It was set to 192 mm. Other sizes and the number of electrode layers are the same as those in the first embodiment.
  • Example 3 In the secondary battery 1 according to Example 3, the size of the exterior member 16 is such that the length in the x direction of the outer dimension (x 4 in FIG. 4 ) is 260 mm, and the length in the y direction of the outer dimension (in FIG. 4). y 4 ) was 210 mm, and the height in the z direction was 4 mm.
  • the length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 284 mm
  • the length (width) in the y direction was 210 mm
  • the length (thickness) in the z direction was 8 mm.
  • Other sizes are the same as those in the first embodiment.
  • Example 4 In the secondary battery 1 according to Example 4, the size of the exterior member 16 is such that the length in the x direction of the outer dimension (x 4 in FIG. 4 ) is 260 mm, and the length in the y direction of the outer dimension (in FIG. 4). y 4 ) was 208 mm, and the height in the z direction was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 235 mm and the length in the y direction (y 3 in FIG. 4) is 198 mm. It was.
  • the size of the upper surface portion of the exterior member 16 the length in the x direction (x 2 in FIG.
  • the length in the x direction of the secondary battery 1 including the electrode terminals 14 and 15 was 284 mm
  • the length (width) in the y direction was 208 mm
  • the length (thickness) in the z direction was 8 mm.
  • Other sizes are the same as those in the first embodiment.
  • Example 5 In the secondary battery 1 according to Example 5, the size of the exterior member 16 is such that the length of the outer dimension in the x direction (x 4 in FIG. 4 ) is 250 mm, and the length of the outer dimension in the y direction (in FIG. 4). y 4 ) was 210 mm, and the height in the z direction was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 225 mm and the length in the y direction (y 3 in FIG. 4) is 200 mm. It was.
  • the size of the upper surface portion of the exterior member 16 the length in the x direction (x 2 in FIG.
  • the length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 274 mm
  • the length (width) in the y direction was 210 mm
  • the length (thickness) in the z direction was 8 mm.
  • Other sizes are the same as those in the first embodiment.
  • Example 6 In the secondary battery 1 according to Example 6, the size of the exterior member 16 is such that the length of the outer dimension in the x direction (x 4 in FIG. 4 ) is 250 mm, and the length of the outer dimension in the y direction (in FIG. 4). y 4 ) was 210 mm, and the height in the z direction was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 225 mm and the length in the y direction (y 3 in FIG. 4) is 200 mm. It was.
  • the size of the upper surface portion of the exterior member 16 the length in the x direction (x 2 in FIG.
  • the length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 274 mm
  • the length (width) in the y direction was 210 mm
  • the length (thickness) in the z direction was 8 mm.
  • Other sizes are the same as those in the first embodiment.
  • Example 7 In the secondary battery 1 according to Example 7, the size of the exterior member 16 is such that the length of the outer dimension in the x direction (x 4 in FIG. 4 ) is 255 mm, and the length of the outer dimension in the y direction (in FIG. 4). y 4 ) was 210 mm, and the height in the z direction was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the x-direction length (x 3 in FIG. 4) is 230 mm, and the y-direction length (y 3 in FIG. 4) is 200 mm. It was.
  • the size of the upper surface portion of the exterior member 16 the length in the x direction (x 2 in FIG.
  • the length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 279 mm
  • the length (width) in the y direction was 210 mm
  • the length (thickness) in the z direction was 8 mm.
  • Other sizes are the same as those in the first embodiment.
  • Example 8 In the secondary battery 1 according to Example 8, the size of the exterior member 16 is such that the outer dimension in the x direction (x 4 in FIG. 4 ) is 253 mm, and the outer dimension in the y direction (in FIG. 4). y 4 ) was 210 mm, and the height in the z direction was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 228 mm, and the length in the y direction (y 3 in FIG. 4) is 200 mm. It was.
  • the size of the upper surface portion of the exterior member 16 the length in the x direction (x 2 in FIG.
  • the length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 277 mm
  • the length (width) in the y direction was 210 mm
  • the length (thickness) in the z direction was 8 mm.
  • Other sizes are the same as those in the first embodiment.
  • Example 9 In the secondary battery 1 according to Example 9, the size of the main surface of the positive electrode plate 11 was 205 mm in length and 110 mm in width.
  • the main surface of the negative electrode plate 13 had a length of 209 mm and a width of 114 mm.
  • the size of the separator was 213 mm in length and 118 mm in width.
  • the size of the exterior member 16 is such that the length of the outer dimension in the x direction (x 4 in FIG. 4) is 246 mm, the length of the outer dimension in the y direction (y 4 in FIG. 4 ) is 130 mm, and the height in the z direction is high.
  • the thickness was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 221 mm and the length in the y direction (y 3 in FIG. 4) is 120 mm. It was. As for the size of the upper surface portion of the exterior member 16, the length in the x direction (x 2 in FIG. 4) was 2211 mm, and the length in the y direction (y 2 in FIG. 4) was 114 mm. The length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 270 mm, the length (width) in the y direction was 130 mm, and the length (thickness) in the z direction was 8 mm. Other sizes are the same as those in the first embodiment.
  • Example 10 In the secondary battery 1 according to Example 10, the size of the main surface of the positive electrode plate 11 was 205 mm in length and 110 mm in width.
  • the main surface of the negative electrode plate 13 had a length of 209 mm and a width of 114 mm.
  • the size of the separator was 213 mm in length and 118 mm in width.
  • the size of the outer member 16 the length of the x-direction of the outer size of the (x 4 in FIG. 4) and 250 mm, length in the y direction of the outer size of the (y 4 in FIG. 4) and 130 mm, in the z-direction height
  • the thickness was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 225 mm and the length in the y direction (y 3 in FIG. 4) is 120 mm. It was. As for the size of the upper surface portion of the exterior member 16, the length in the x direction (x 2 in FIG. 4) was 215 mm, and the length in the y direction (y 2 in FIG. 4) was 112 mm. The length in the x direction of the secondary battery 1 including the electrode terminals 14 and 15 was 274 mm, the length (width) in the y direction was 130 mm, and the length (thickness) in the z direction was 8 mm. Other sizes are the same as those in the first embodiment.
  • Example 11 In the secondary battery 1 according to Example 11, the size of the main surface of the positive electrode plate 11 was 205 mm in length and 110 mm in width.
  • the main surface of the negative electrode plate 13 had a length of 209 mm and a width of 114 mm.
  • the size of the separator was 213 mm in length and 118 mm in width.
  • the size of the exterior member 16 is such that the length of the outer dimension in the x direction (x 4 in FIG. 4) is 240 mm, the length of the outer dimension in the y direction (y 4 in FIG. 4 ) is 130 mm, and the height in the z direction is high.
  • the thickness was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 215 mm, and the length in the y direction (y 3 in FIG. 4) is 120 mm. It was. As for the size of the upper surface portion of the exterior member 16, the length in the x direction (x 2 in FIG. 4) was 211 mm, and the length in the y direction (y 2 in FIG. 4) was 112 mm. The length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 264 mm, the length (width) in the y direction was 130 mm, and the length (thickness) in the z direction was 8 mm. Other sizes are the same as those in the first embodiment.
  • the size of the exterior member 16 is such that the length in the x direction of the outer dimension (x 4 in FIG. 4 ) is 250 mm, and the length in the y direction of the outer dimension (in FIG. 4). the y 4) and 210 mm, and a 4mm height in the z direction.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 225 mm and the length in the y direction (y 3 in FIG. 4) is 200 mm. It was.
  • the size of the upper surface portion of the exterior member 16 the length in the x direction (x 2 in FIG.
  • the length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 274 mm
  • the length (width) in the y direction was 210 mm
  • the length (thickness) in the z direction was 8 mm.
  • Other sizes are the same as those in the first embodiment.
  • the outer member 16 has an outer dimension in the x direction (x 4 in FIG. 4 ) of 250 mm and an outer dimension in the y direction (in FIG. 4).
  • y 4 was 216 mm
  • the height in the z direction was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 225 mm and the length in the y direction (y 3 in FIG. 4) is 206 mm. It was.
  • the size of the upper surface portion of the exterior member 16 the length in the x direction (x 2 in FIG.
  • the length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 274 mm
  • the length (width) in the y direction was 216 mm
  • the length (thickness) in the z direction was 8 mm.
  • Other sizes are the same as those in the first embodiment.
  • Comparative Example 3 In the secondary battery 1 according to Comparative Example 3, the size of the exterior member 16 is such that the outer dimension in the x direction (x 4 in FIG. 4 ) is 264 mm and the outer dimension in the y direction (in FIG. 4). y 4 ) was 208 mm, and the height in the z direction was 4 mm. The size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 239 mm, and the length in the y direction (y 3 in FIG. 4) is 198 mm. It was. As for the size of the upper surface portion of the exterior member 16, the length in the x direction (x 2 in FIG.
  • the length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 288 mm
  • the length (width) in the y direction was 208 mm
  • the length (thickness) in the z direction was 8 mm.
  • Other sizes are the same as those in the first embodiment.
  • Comparative Example 4 In the secondary battery 1 according to Comparative Example 4, the size of the exterior member 16 is such that the length of the outer dimension in the x direction (x 4 in FIG. 4 ) is 264 mm, and the length of the outer dimension in the y direction (in FIG. 4). y 4 ) was 208 mm, and the height in the z direction was 4 mm. The size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 239 mm, and the length in the y direction (y 3 in FIG. 4) is 198 mm. It was. As for the size of the upper surface portion of the exterior member 16, the length in the x direction (x 2 in FIG.
  • the length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 288 mm
  • the length (width) in the y direction was 208 mm
  • the length (thickness) in the z direction was 8 mm.
  • Other sizes are the same as those in the first embodiment.
  • Comparative Example 5 In the secondary battery 1 according to Comparative Example 5, the size of the main surface of the positive electrode plate 11 was 205 mm in length and 110 mm in width. The main surface of the negative electrode plate 13 had a length of 209 mm and a width of 114 mm. The size of the separator was 213 mm in length and 118 mm in width. The size of the exterior member 16 is such that the length of the outer dimension in the x direction (x 4 in FIG. 4) is 240 mm, the length of the outer dimension in the y direction (y 4 in FIG. 4 ) is 136 mm, and the height in the z direction is high. The thickness was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 215 mm and the length in the y direction (y 3 in FIG. 4) is 126 mm. It was. Regarding the size of the upper surface portion of the exterior member 16, the length in the x direction (x 2 in FIG. 4) was 209 mm, and the length in the y direction (y 2 in FIG. 4) was 118 mm. The length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 264 mm, the length (width) in the y direction was 136 mm, and the length (thickness) in the z direction was 8 mm. Other sizes are the same as those in the first embodiment.
  • Comparative Example 6 In the secondary battery 1 according to Comparative Example 6, the size of the main surface of the positive electrode plate 11 was 205 mm in length and 110 mm in width. The main surface of the negative electrode plate 13 had a length of 209 mm and a width of 114 mm. The size of the separator was 213 mm in length and 118 mm in width. The size of the exterior member 16 is such that the length of the outer dimension in the x direction (x 4 in FIG. 4) is 254 mm, the length of the outer dimension in the y direction (y 4 in FIG. 4 ) is 128 mm, and the height in the z direction is high. The thickness was 4 mm.
  • the size of the internal space of the secondary battery 1 that seals the power generation element 18 is such that the length in the x direction (x 3 in FIG. 4) is 229 mm, and the length in the y direction (y 3 in FIG. 4) is 118 mm. It was. As for the size of the upper surface portion of the exterior member 16, the length in the x direction (x 2 in FIG. 4) was 217 mm, and the length in the y direction (y 2 in FIG. 4) was 112 mm. The length of the secondary battery 1 including the electrode terminals 14 and 15 in the x direction was 278 mm, the length (width) in the y direction was 128 mm, and the length (thickness) in the z direction was 8 mm. Other sizes are the same as those in the first embodiment.
  • the long side and the short side of the electrode represent the length of the long side and the short side of the laminated surface of the electrode plate, respectively.
  • FIG. 7 shows the capacity retention ratio with respect to L A / L B for the secondary batteries 1 according to Examples 1 to 8 and Comparative Examples 1 to 4 (the size of the laminated surface of the electrode plates is 215 ⁇ 190).
  • FIG. 8 shows the capacity retention ratio with respect to L A / L B for the secondary batteries 1 according to Examples 9 to 11 and Comparative Examples 5 and 6 (the size of the laminated surface of the electrode plates is 205 ⁇ 110).
  • a high capacity maintenance ratio (capacity maintenance ratio of 80% or more) could be obtained.
  • a high capacity retention rate (capacity retention rate of 80% or more) is obtained after using 1 1000 cyc. I was able to.
  • a high capacity maintenance ratio (capacity maintenance ratio of 80% or more) can be obtained after using 1000 cyc. It was. Further, in the secondary battery in which the parameters (a A , a B , d) are defined so as to satisfy the formula (4), 1 should obtain a high capacity maintenance ratio (capacity maintenance ratio of 80% or more) after using 1000 cyc. I was able to.
  • the parameter (L A, L B) has the formula (1) does not satisfy the secondary battery 1 (Comparative Examples 1-6), after using 1000 cycles, resulted in capacity retention is poor.
  • FIG. 9 shows the evaluation results of the value of L A / d for b and the value of L B / d for b for Examples 1 to 11 and Comparative Examples 4 and 6.
  • the horizontal axis indicates b, and the vertical axis indicates L / d.
  • L in the vertical axis is obtained by replacing the L A and L B, respectively.
  • Example 1 A represents the value of L A / d for b
  • Example 1 B represents the value of L B / d for b.
  • Other examples and comparative examples are similarly represented. Note that Comparative Examples 1, 2, and 5 are not shown in the condition 1 because L A / d ⁇ L B / d is not satisfied.
  • the minimum value and the maximum value of L / d with respect to b are respectively defined within the range of 4 ⁇ b ⁇ 10.
  • the minimum value is a ratio of b and L / d that represents the shape of the surplus space that can provide a desired capacity retention rate (for example, 80%) even in a secondary battery after a predetermined number of times. .
  • the capacity maintenance rate is a desired capacity maintenance rate. Less than.
  • the maximum value represents the shape of the surplus space that can make the battery reaction uniform by the ratio of b and L / d.
  • the value of L / d for b is greater than or equal to the maximum value, the volume of the surplus space becomes too large, the battery reaction becomes non-uniform, and the durability of the battery decreases.
  • Example 1 to 11 and Comparative Examples 4 and 6 the value of a A / d for b and the value of a B / d for b were also evaluated.
  • the evaluation results are shown in FIG. A vertical axis is obtained by replacing each of a A and a B.
  • the display of Example 1 A etc. is the same as that of FIG.
  • Comparative Examples 1, 2, and 5 are not shown in the condition 2 because a A / d ⁇ a B / d is not satisfied.
  • the definition of the minimum and maximum values of a / d for b is the same as the minimum and maximum values of L / d for b.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)

Abstract

Cette invention concerne une batterie rechargeable plane caractérisée en ce qu'elle comprend un élément stratifié de génération d'énergie et une paire d'éléments extérieurs, ledit élément stratifié de génération d'énergie comprenant une pluralité d'électrodes planes stratifiées par l'intermédiaire d'un séparateur et ladite paire d'éléments extérieurs étant agencée en une forme rectangulaire qui scelle l'élément stratifié de génération d'énergie ainsi qu'un électrolyte et qui présente des côtés longs et des côtés courts telle qu'elle est vue dans le sens de stratification de la pluralité d'électrodes. Ladite batterie est en outre caractérisée en ce qu'elle comprend : au moins un élément extérieur en dehors de la paire d'éléments extérieurs, présentant une section de contact comprenant une surface de contact qui entre en contact avec une électrode de couche supérieure disposée sur la couche supérieure parmi la pluralité d'électrodes ; une section d'étanchéité qui est chevauchée par les éléments extérieurs à une position sur le périmètre externe des éléments extérieurs ; et une section d'extension qui s'étend à partir de la section de contact à la section d'étanchéité. Ladite batterie est enfin caractérisée en ce qu'elle satisfait à : 1 ≤ LA/LB ≤ 2. Dans une première vue en coupe transversale effectuée en coupant la batterie plane le long d'une surface parallèle aux côtés longs et dans le sens de stratification de celle-ci, LA est la longueur moyenne d'une paire de sections d'extrémité disposées aux deux extrémités dans un sens parallèle aux côtés longs. Dans une seconde vue en coupe transversale effectuée en coupant la batterie plane le long d'une surface parallèle aux côtés courts et le long de la direction de stratification, LB est la longueur moyenne d'une paire de sections d'extension disposées aux deux extrémités dans un sens parallèle aux côtés courts.
PCT/JP2015/060125 2014-04-11 2015-03-31 Batterie rechargeable plane WO2015156167A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP15776103.2A EP3131135B1 (fr) 2014-04-11 2015-03-31 Batterie rechargeable plane
KR1020167027691A KR101917488B1 (ko) 2014-04-11 2015-03-31 편평형 이차 전지
CN201580019224.XA CN106165144B (zh) 2014-04-11 2015-03-31 扁平型二次电池
US15/302,435 US10431852B2 (en) 2014-04-11 2015-03-31 Flat secondary battery
JP2016512677A JP6281635B2 (ja) 2014-04-11 2015-03-31 扁平型二次電池

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-082374 2014-04-11
JP2014082374 2014-04-11

Publications (1)

Publication Number Publication Date
WO2015156167A1 true WO2015156167A1 (fr) 2015-10-15

Family

ID=54287744

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/060125 WO2015156167A1 (fr) 2014-04-11 2015-03-31 Batterie rechargeable plane

Country Status (6)

Country Link
US (1) US10431852B2 (fr)
EP (1) EP3131135B1 (fr)
JP (1) JP6281635B2 (fr)
KR (1) KR101917488B1 (fr)
CN (1) CN106165144B (fr)
WO (1) WO2015156167A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116130850B (zh) * 2023-04-13 2024-01-16 宁德新能源科技有限公司 二次电池及用电设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000067925A (ja) * 1998-08-25 2000-03-03 Japan Storage Battery Co Ltd 非水電解質二次電池の製造方法及び製造装置
JP2006079858A (ja) * 2004-09-07 2006-03-23 Nissan Motor Co Ltd 二次電池
JP2006185710A (ja) * 2004-12-27 2006-07-13 Nissan Motor Co Ltd 二次電池及び組電池
JP2011507183A (ja) * 2007-12-14 2011-03-03 エルジー・ケム・リミテッド 新規な構造の密封部分を有する二次バッテリー

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3596420B2 (ja) 2000-04-17 2004-12-02 松下電器産業株式会社 非水電解質二次電池
US7476467B2 (en) * 2004-03-29 2009-01-13 Lg Chem, Ltd. Lithium secondary battery with high power
JP4208865B2 (ja) * 2005-07-07 2009-01-14 株式会社東芝 非水電解質電池及び電池パック
JP2007194202A (ja) * 2005-12-20 2007-08-02 Sony Corp リチウムイオン二次電池
KR20070065803A (ko) 2005-12-20 2007-06-25 소니 가부시끼 가이샤 정극 활물질과 리튬 이온 2차 전지
JP5175453B2 (ja) 2006-05-25 2013-04-03 日本電気株式会社 フィルム外装電気デバイス
EP2001073B1 (fr) * 2007-06-06 2012-02-22 Nissan Motor Co., Ltd. Batterie secondaire et procédé de production de la batterie secondaire
JP5676172B2 (ja) 2010-08-03 2015-02-25 Ｎｅｃエナジーデバイス株式会社 ラミネートフィルム外装積層型電池の製造方法
CN102290245B (zh) * 2011-04-29 2012-11-21 深圳市惠程电气股份有限公司 一种聚酰亚胺电容电池及其制作方法
JP5451681B2 (ja) * 2011-05-09 2014-03-26 シャープ株式会社 正極活物質、正極及び非水系二次電池
JP2013073867A (ja) * 2011-09-29 2013-04-22 Toppan Printing Co Ltd 非水電解液二次電池用正極活物質及びその製造方法、並びに非水電解液二次電池
JP2013084566A (ja) * 2011-09-30 2013-05-09 Fuji Heavy Ind Ltd 非水電解質二次電池

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000067925A (ja) * 1998-08-25 2000-03-03 Japan Storage Battery Co Ltd 非水電解質二次電池の製造方法及び製造装置
JP2006079858A (ja) * 2004-09-07 2006-03-23 Nissan Motor Co Ltd 二次電池
JP2006185710A (ja) * 2004-12-27 2006-07-13 Nissan Motor Co Ltd 二次電池及び組電池
JP2011507183A (ja) * 2007-12-14 2011-03-03 エルジー・ケム・リミテッド 新規な構造の密封部分を有する二次バッテリー

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3131135A4 *

Also Published As

Publication number Publication date
JPWO2015156167A1 (ja) 2017-04-13
CN106165144B (zh) 2018-10-23
EP3131135B1 (fr) 2018-10-31
JP6281635B2 (ja) 2018-02-21
KR101917488B1 (ko) 2018-11-09
EP3131135A1 (fr) 2017-02-15
US10431852B2 (en) 2019-10-01
US20170025710A1 (en) 2017-01-26
CN106165144A (zh) 2016-11-23
EP3131135A4 (fr) 2017-02-15
KR20160130827A (ko) 2016-11-14

Similar Documents

Publication Publication Date Title
JP6348807B2 (ja) リチウムイオン二次電池
JP5246747B2 (ja) リチウムイオン二次電池用負極、およびそれを用いたリチウムイオン二次電池
JP2009123715A (ja) リチウムイオン二次電池
JP5552398B2 (ja) リチウムイオン電池
JP2017168270A (ja) リチウムイオン二次電池
JP2016024987A (ja) 非水系二次電池
WO2019098056A1 (fr) Batterie secondaire au lithium-ion
JP5761439B2 (ja) 非水電解質二次電池およびそれを用いた蓄電回路
JP5462304B2 (ja) リチウムイオン電池を用いた組電池
JP6187677B2 (ja) 扁平型二次電池
KR102070907B1 (ko) 충방전 시 발생하는 가스를 수용할 수 있는 잉여부를 포함하는 전지셀
JP7003775B2 (ja) リチウムイオン二次電池
JP6281635B2 (ja) 扁平型二次電池
JP6106774B2 (ja) 角形リチウムイオン電池
KR102026292B1 (ko) 활물질 로딩량의 구배를 가진 전극을 포함하는 전극조립체
CN108695557B (zh) 非水电解液二次电池
JP2016085884A (ja) 電池
CN112335091A (zh) 锂离子二次电池
JP2019169307A (ja) 電気化学素子
KR20140039501A (ko) 이차전지의 전극조립체
JP7130920B2 (ja) 非水電解液二次電池、非水電解液二次電池の設計方法及び非水電解液二次電池の製造方法
JP2005122923A (ja) 薄型電池
CN112335092A (zh) 锂离子二次电池

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15776103

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
ENP Entry into the national phase

Ref document number: 2016512677

Country of ref document: JP

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 20167027691

Country of ref document: KR

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 15302435

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2015776103

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2015776103

Country of ref document: EP